There are around 1,200 living (extant) species of Lycopodiophyta which are generally divided into three orders (Lycopodiales, Isoetales, and Selaginellales); in addition there are extinct groups.hese species reproduce by shedding spores and have macroscopic alternation of generations, although some are homosporous while others are heterosporous. Members of Lycopodiophyta bear a protostele, and the sporophyte generation is dominant.
Q: Nutrients are primarily absorbed in the: 1. Stomach 2. Small Intestine 3. Large Intestine Q: Release of digestive secretions is controlled by which of the following: 1. Chewing food 2. Stretching of the stomach 3. Chyme entering the small intestine 4. All of the above! Copyright Â© 2009 Pearson Education, Inc.
Your body relies on water to act as a courier system. Water transports nutrients to every cell in your body and then carries away waste products from cells. When you digest food, the nutrients become water-soluble and then enter the circulatory system, borne on blood that is 92 percent water. As your body produces cell waste, your body's water-based fluids move the waste from cells, and lubricate the kidneys to cleanse the body of toxins. Water also keeps bowel movements running smoothly to rid the body of additional waste. Water's benefits don't stop there. Your body uses it for a plethora of other functions, too. It's a big part of the fluid that surrounds, cushions and lubricates joints. And, water fuels the fluids that create saliva, and moisten the mouth, nose and other mucus membranes [source: New Health Guide ].